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1977 through 1979. The US EPA set the MCL at 0.2 parts per billion (ppb, equivalent to <br /> ug/L) because it believes that given present technology and resources, this is the lowest <br /> level to which water systems can reasonably be required to remove this contaminant <br /> should it occur in drinking water. The Maximum Contaminant Level Goal (MCLG) for <br /> DBCP is zero. <br /> The laboratory analytical results are attached as Appendix 5 of this report. <br /> Soil Profile and Geologic Information <br /> The Site is depicted on the Preliminary geologic map showing Quaternary deposits of <br /> the Lodi Quadrangle, California (Marchand and Atwater, 1979). The Site is depicted <br /> within the Modesto Formation upper member, described as "arkosic alluvium forming <br /> Mokelumne River alluvial fan, chiefly sand ... probably glacial outwash" (Plate 8). <br /> The surface and near surface soils located at the Site are reported by the USDA Soil <br /> Survey of San Joaquin County, California to be composed of Tokay fine sandy loam <br /> (Plate 9) (USDA, 1992). The table below presents some selected properties of this soil: <br /> Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm <br /> y pH (iri fields <br /> Tokay fine 0-19 Fine sandy loam; SM <2 6.1-7.8 2.0-6.0 Slight <br /> sandy loam, 19-45 Fine sandy loam, sandy <2 6.1-7.8 2.0-6.0 <br /> 0-2% loam; SM <br /> slopes, 256 45-60 Fine sandy loam, sandy <2 6.1-8.4 2.0-6.0 <br /> loam, coarse sandy <br /> loam, SM <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> See description of the map unit for composition and behavior characteristics of the map unit. <br /> Soil Borings <br /> On December 13, 2011, Live Oak excavated one shallow soil boring on the proposed //o,Lt(o.3) <br /> homesite parcel on the Site for the purpose of conducting a percolation test. The boring <br /> was four inches in diameter, 3.20 feet deep, and was excavated by hand auger (Table L� <br /> 2). The boring location is indicated on Plate 10. <br /> The soil in the boring was similar to that described by the Soil Survey. Fine sandy silt <br /> was encountered to the full depth of the boring. The log for the soil boring is presented <br /> in Plate 11. <br /> LOGE 1112 Page 5 <br />